diff options
Diffstat (limited to 'opcodes/cgen-dis.in')
| -rw-r--r-- | opcodes/cgen-dis.in | 582 |
1 files changed, 0 insertions, 582 deletions
diff --git a/opcodes/cgen-dis.in b/opcodes/cgen-dis.in deleted file mode 100644 index 31a6afd..0000000 --- a/opcodes/cgen-dis.in +++ /dev/null @@ -1,582 +0,0 @@ -/* Disassembler interface for targets using CGEN. -*- C -*- - CGEN: Cpu tools GENerator - -THIS FILE IS USED TO GENERATE @prefix@-dis.c. - -Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. - -This file is part of the GNU Binutils and GDB, the GNU debugger. - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software Foundation, Inc., -59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "sysdep.h" -#include <stdio.h> -#include "ansidecl.h" -#include "dis-asm.h" -#include "bfd.h" -#include "symcat.h" -#include "@prefix@-opc.h" -#include "opintl.h" - -#undef INLINE -#ifdef __GNUC__ -#define INLINE __inline__ -#else -#define INLINE -#endif - -/* Default text to print if an instruction isn't recognized. */ -#define UNKNOWN_INSN_MSG _("*unknown*") - -/* Used by the ifield rtx function. */ -#define FLD(f) (fields->f) - -static int extract_normal - PARAMS ((CGEN_OPCODE_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, - unsigned int, unsigned int, unsigned int, unsigned int, - unsigned int, unsigned int, bfd_vma, long *)); -static void print_normal - PARAMS ((CGEN_OPCODE_DESC, PTR, long, unsigned int, bfd_vma, int)); -static void print_address - PARAMS ((CGEN_OPCODE_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int)); -static void print_keyword - PARAMS ((CGEN_OPCODE_DESC, PTR, CGEN_KEYWORD *, long, unsigned int)); -static int extract_insn_normal - PARAMS ((CGEN_OPCODE_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *, - CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma)); -static void print_insn_normal - PARAMS ((CGEN_OPCODE_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *, - bfd_vma, int)); -static int print_insn PARAMS ((CGEN_OPCODE_DESC, bfd_vma, - disassemble_info *, char *, int)); -static int default_print_insn - PARAMS ((CGEN_OPCODE_DESC, bfd_vma, disassemble_info *)); - -/* -- disassembler routines inserted here */ - -#if ! CGEN_INT_INSN_P - -/* Subroutine of extract_normal. - Ensure sufficient bytes are cached in EX_INFO. - OFFSET is the offset in bytes from the start of the insn of the value. - BYTES is the length of the needed value. - Returns 1 for success, 0 for failure. */ - -static INLINE int -fill_cache (od, ex_info, offset, bytes, pc) - CGEN_OPCODE_DESC od; - CGEN_EXTRACT_INFO *ex_info; - int offset, bytes; - bfd_vma pc; -{ - /* It's doubtful that the middle part has already been fetched so - we don't optimize that case. kiss. */ - int mask; - disassemble_info *info = (disassemble_info *) ex_info->dis_info; - - /* First do a quick check. */ - mask = (1 << bytes) - 1; - if (((ex_info->valid >> offset) & mask) == mask) - return 1; - - /* Search for the first byte we need to read. */ - for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1) - if (! (mask & ex_info->valid)) - break; - - if (bytes) - { - int status; - - pc += offset; - status = (*info->read_memory_func) - (pc, ex_info->insn_bytes + offset, bytes, info); - - if (status != 0) - { - (*info->memory_error_func) (status, pc, info); - return 0; - } - - ex_info->valid |= ((1 << bytes) - 1) << offset; - } - - return 1; -} - -/* Subroutine of extract_normal. */ - -static INLINE long -extract_1 (od, ex_info, start, length, word_length, bufp, pc) - CGEN_OPCODE_DESC od; - CGEN_EXTRACT_INFO *ex_info; - int start,length,word_length; - unsigned char *bufp; - bfd_vma pc; -{ - unsigned long x,mask; - int shift; - int big_p = CGEN_OPCODE_INSN_ENDIAN (od) == CGEN_ENDIAN_BIG; - - switch (word_length) - { - case 8: - x = *bufp; - break; - case 16: - if (big_p) - x = bfd_getb16 (bufp); - else - x = bfd_getl16 (bufp); - break; - case 24: - /* ??? This may need reworking as these cases don't necessarily - want the first byte and the last two bytes handled like this. */ - if (big_p) - x = (bufp[0] << 16) | bfd_getb16 (bufp + 1); - else - x = bfd_getl16 (bufp) | (bufp[2] << 16); - break; - case 32: - if (big_p) - x = bfd_getb32 (bufp); - else - x = bfd_getl32 (bufp); - break; - default : - abort (); - } - - /* Written this way to avoid undefined behaviour. */ - mask = (((1L << (length - 1)) - 1) << 1) | 1; - if (CGEN_INSN_LSB0_P) - shift = (start + 1) - length; - else - shift = (word_length - (start + length)); - return (x >> shift) & mask; -} - -#endif /* ! CGEN_INT_INSN_P */ - -/* Default extraction routine. - - INSN_VALUE is the first CGEN_BASE_INSN_SIZE bits of the insn in host order, - or sometimes less for cases like the m32r where the base insn size is 32 - but some insns are 16 bits. - ATTRS is a mask of the boolean attributes. We only need `UNSIGNED', - but for generality we take a bitmask of all of them. - WORD_OFFSET is the offset in bits from the start of the insn of the value. - WORD_LENGTH is the length of the word in bits in which the value resides. - START is the starting bit number in the word, architecture origin. - LENGTH is the length of VALUE in bits. - TOTAL_LENGTH is the total length of the insn in bits. - - Returns 1 for success, 0 for failure. */ - -/* ??? The return code isn't properly used. wip. */ - -/* ??? This doesn't handle bfd_vma's. Create another function when - necessary. */ - -static int -extract_normal (od, ex_info, insn_value, attrs, word_offset, start, length, - word_length, total_length, pc, valuep) - CGEN_OPCODE_DESC od; - CGEN_EXTRACT_INFO *ex_info; - CGEN_INSN_INT insn_value; - unsigned int attrs; - unsigned int word_offset, start, length, word_length, total_length; - bfd_vma pc; - long *valuep; -{ - CGEN_INSN_INT value; - - /* If LENGTH is zero, this operand doesn't contribute to the value - so give it a standard value of zero. */ - if (length == 0) - { - *valuep = 0; - return 1; - } - - if (CGEN_INT_INSN_P - && word_offset != 0) - abort (); - - if (word_length > 32) - abort (); - - /* For architectures with insns smaller than the insn-base-bitsize, - word_length may be too big. */ -#if CGEN_MIN_INSN_BITSIZE < CGEN_BASE_INSN_BITSIZE - if (word_offset == 0 - && word_length > total_length) - word_length = total_length; -#endif - - /* Does the value reside in INSN_VALUE? */ - - if (word_offset == 0) - { - /* Written this way to avoid undefined behaviour. */ - CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1; - - if (CGEN_INSN_LSB0_P) - value = insn_value >> ((start + 1) - length); - else - value = insn_value >> (word_length - (start + length)); - value &= mask; - /* sign extend? */ - if (! CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_UNSIGNED) - && (value & (1L << (length - 1)))) - value |= ~mask; - } - -#if ! CGEN_INT_INSN_P - - else - { - unsigned char *bufp = ex_info->insn_bytes + word_offset / 8; - - if (word_length > 32) - abort (); - - if (fill_cache (od, ex_info, word_offset / 8, word_length / 8, pc) == 0) - return 0; - - value = extract_1 (od, ex_info, start, length, word_length, bufp, pc); - } - -#endif /* ! CGEN_INT_INSN_P */ - - *valuep = value; - - return 1; -} - -/* Default print handler. */ - -static void -print_normal (od, dis_info, value, attrs, pc, length) - CGEN_OPCODE_DESC od; - PTR dis_info; - long value; - unsigned int attrs; - bfd_vma pc; - int length; -{ - disassemble_info *info = (disassemble_info *) dis_info; - -#ifdef CGEN_PRINT_NORMAL - CGEN_PRINT_NORMAL (od, info, value, attrs, pc, length); -#endif - - /* Print the operand as directed by the attributes. */ - if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) - ; /* nothing to do */ - else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_UNSIGNED)) - (*info->fprintf_func) (info->stream, "0x%lx", value); - else - (*info->fprintf_func) (info->stream, "%ld", value); -} - -/* Default address handler. */ - -static void -print_address (od, dis_info, value, attrs, pc, length) - CGEN_OPCODE_DESC od; - PTR dis_info; - bfd_vma value; - unsigned int attrs; - bfd_vma pc; - int length; -{ - disassemble_info *info = (disassemble_info *) dis_info; - -#ifdef CGEN_PRINT_ADDRESS - CGEN_PRINT_ADDRESS (od, info, value, attrs, pc, length); -#endif - - /* Print the operand as directed by the attributes. */ - if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) - ; /* nothing to do */ - else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR)) - (*info->print_address_func) (value, info); - else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR)) - (*info->print_address_func) (value, info); - else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_UNSIGNED)) - (*info->fprintf_func) (info->stream, "0x%lx", (long) value); - else - (*info->fprintf_func) (info->stream, "%ld", (long) value); -} - -/* Keyword print handler. */ - -static void -print_keyword (od, dis_info, keyword_table, value, attrs) - CGEN_OPCODE_DESC od; - PTR dis_info; - CGEN_KEYWORD *keyword_table; - long value; - unsigned int attrs; -{ - disassemble_info *info = (disassemble_info *) dis_info; - const CGEN_KEYWORD_ENTRY *ke; - - ke = cgen_keyword_lookup_value (keyword_table, value); - if (ke != NULL) - (*info->fprintf_func) (info->stream, "%s", ke->name); - else - (*info->fprintf_func) (info->stream, "???"); -} - -/* Default insn extractor. - - INSN_VALUE is the first CGEN_BASE_INSN_SIZE bytes, translated to host order. - The extracted fields are stored in FIELDS. - EX_INFO is used to handle reading variable length insns. - Return the length of the insn in bits, or 0 if no match, - or -1 if an error occurs fetching data (memory_error_func will have - been called). */ - -static int -extract_insn_normal (od, insn, ex_info, insn_value, fields, pc) - CGEN_OPCODE_DESC od; - const CGEN_INSN *insn; - CGEN_EXTRACT_INFO *ex_info; - CGEN_INSN_INT insn_value; - CGEN_FIELDS *fields; - bfd_vma pc; -{ - const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); - const unsigned char *syn; - - CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); - - CGEN_INIT_EXTRACT (od); - - for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) - { - int length; - - if (CGEN_SYNTAX_CHAR_P (*syn)) - continue; - - length = @arch@_cgen_extract_operand (od, CGEN_SYNTAX_FIELD (*syn), - ex_info, insn_value, fields, pc); - if (length <= 0) - return length; - } - - /* We recognized and successfully extracted this insn. */ - return CGEN_INSN_BITSIZE (insn); -} - -/* Default insn printer. - - DIS_INFO is defined as `PTR' so the disassembler needn't know anything - about disassemble_info. */ - -static void -print_insn_normal (od, dis_info, insn, fields, pc, length) - CGEN_OPCODE_DESC od; - PTR dis_info; - const CGEN_INSN *insn; - CGEN_FIELDS *fields; - bfd_vma pc; - int length; -{ - const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); - disassemble_info *info = (disassemble_info *) dis_info; - const unsigned char *syn; - - CGEN_INIT_PRINT (od); - - for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) - { - if (CGEN_SYNTAX_MNEMONIC_P (*syn)) - { - (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); - continue; - } - if (CGEN_SYNTAX_CHAR_P (*syn)) - { - (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); - continue; - } - - /* We have an operand. */ - @arch@_cgen_print_operand (od, CGEN_SYNTAX_FIELD (*syn), info, - fields, CGEN_INSN_ATTRS (insn), pc, length); - } -} - -/* Utility to print an insn. - BUF is the base part of the insn, target byte order, BUFLEN bytes long. - The result is the size of the insn in bytes or zero for an unknown insn - or -1 if an error occurs fetching data (memory_error_func will have - been called). */ - -static int -print_insn (od, pc, info, buf, buflen) - CGEN_OPCODE_DESC od; - bfd_vma pc; - disassemble_info *info; - char *buf; - int buflen; -{ - unsigned long insn_value; - const CGEN_INSN_LIST *insn_list; - CGEN_EXTRACT_INFO ex_info; - - ex_info.dis_info = info; - ex_info.valid = (1 << CGEN_BASE_INSN_SIZE) - 1; - ex_info.insn_bytes = buf; - - switch (buflen) - { - case 1: - insn_value = buf[0]; - break; - case 2: - insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf); - break; - case 4: - insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf); - break; - default: - abort (); - } - - /* The instructions are stored in hash lists. - Pick the first one and keep trying until we find the right one. */ - - insn_list = CGEN_DIS_LOOKUP_INSN (od, buf, insn_value); - while (insn_list != NULL) - { - const CGEN_INSN *insn = insn_list->insn; - CGEN_FIELDS fields; - int length; - -#if 0 /* not needed as insn shouldn't be in hash lists if not supported */ - /* Supported by this cpu? */ - if (! @arch@_cgen_insn_supported (od, insn)) - continue; -#endif - - /* Basic bit mask must be correct. */ - /* ??? May wish to allow target to defer this check until the extract - handler. */ - if ((insn_value & CGEN_INSN_BASE_MASK (insn)) - == CGEN_INSN_BASE_VALUE (insn)) - { - /* Printing is handled in two passes. The first pass parses the - machine insn and extracts the fields. The second pass prints - them. */ - - length = (*CGEN_EXTRACT_FN (insn)) (od, insn, &ex_info, insn_value, - &fields, pc); - /* length < 0 -> error */ - if (length < 0) - return length; - if (length > 0) - { - (*CGEN_PRINT_FN (insn)) (od, info, insn, &fields, pc, length); - /* length is in bits, result is in bytes */ - return length / 8; - } - } - - insn_list = CGEN_DIS_NEXT_INSN (insn_list); - } - - return 0; -} - -/* Default value for CGEN_PRINT_INSN. - The result is the size of the insn in bytes or zero for an unknown insn - or -1 if an error occured fetching bytes. */ - -#ifndef CGEN_PRINT_INSN -#define CGEN_PRINT_INSN default_print_insn -#endif - -static int -default_print_insn (od, pc, info) - CGEN_OPCODE_DESC od; - bfd_vma pc; - disassemble_info *info; -{ - char buf[CGEN_MAX_INSN_SIZE]; - int status; - - /* Read the base part of the insn. */ - - status = (*info->read_memory_func) (pc, buf, CGEN_BASE_INSN_SIZE, info); - if (status != 0) - { - (*info->memory_error_func) (status, pc, info); - return -1; - } - - return print_insn (od, pc, info, buf, CGEN_BASE_INSN_SIZE); -} - -/* Main entry point. - Print one instruction from PC on INFO->STREAM. - Return the size of the instruction (in bytes). */ - -int -print_insn_@arch@ (pc, info) - bfd_vma pc; - disassemble_info *info; -{ - int length; - static CGEN_OPCODE_DESC od = 0; - int mach = info->mach; - int big_p = info->endian == BFD_ENDIAN_BIG; - - /* If we haven't initialized yet, initialize the opcode table. */ - if (! od) - { - od = @arch@_cgen_opcode_open (mach, - big_p ? - CGEN_ENDIAN_BIG - : CGEN_ENDIAN_LITTLE); - @arch@_cgen_init_dis (od); - } - /* If we've switched cpu's, re-initialize. */ - /* ??? Perhaps we should use BFD_ENDIAN. */ - else if (mach != CGEN_OPCODE_MACH (od) - || (CGEN_OPCODE_ENDIAN (od) - != (big_p ? CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE))) - { - cgen_set_cpu (od, mach, big_p ? CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE); - } - - /* We try to have as much common code as possible. - But at this point some targets need to take over. */ - /* ??? Some targets may need a hook elsewhere. Try to avoid this, - but if not possible try to move this hook elsewhere rather than - have two hooks. */ - length = CGEN_PRINT_INSN (od, pc, info); - if (length > 0) - return length; - if (length < 0) - return -1; - - (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); - return CGEN_DEFAULT_INSN_SIZE; -} |